Nitrate → Zinc Phosphate

HRID 441281

Reaktionsgleichung

Reaktionsgleichung von HRID 441281
[Zn:1].[P:2]([O-:6])([O-:5])([O-:4])=[O:3].N([O-])=O.[F-].[N+]([O-])([O-])=O.[OH:15][P:16]([OH:19])([OH:18])=[O:17]>O.[Ni]>[P:2]([O-:6])([O-:5])([O-:4])=[O:3].[Zn+2:1].[P:16]([O-:19])([O-:18])([O-:17])=[O:15].[Zn+2:1].[Zn+2:1]

Komponenten

9

Edukt 6

HCID 943NitrateHCID 946NitriteHCID 1004Phosphoric AcidHCID 1061PhosphateHCID 23994ZincHCID 28179Fluoride Ion

Produkt 1

HCID 24519Zinc Phosphate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 935NickelKatalysatorHCID 962WaterLösungsmittel3×

Reaktionsbedingungen

Temperatur
150 fahrenheit

Versuchsvorschrift

An aqueous acidic zinc phosphate coating solution was prepared in a five-gallon laboratory spray tank to contain 1.8 g/l zinc ions, 6.1 g/l phosphate ions, 0.11 g/l nitrite ions, 0.12 g/l nickel ions, and 0.3 g/l fluoride and 2.0 g/l nitrate ions. This solution was heated to 150° F., and when titrated in the conventional manner, was found to have a total acid of 12.0 points and a free acid of 0.8 point. In a second spray tank, a conventional alkaline cleaner was prepared at a concentration of 1 ounce per gallon and was heated to 145° F. In a third spray tank, a solution of a water soluble melamine-formaldehyde resin was prepared by dissolving 17.2 grams of resin R17 in 21.5 l water and adjusting the pH to 4.5 with 25% H3PO4 (80°F.). A number of 4 × 12 inch SAE 1010, cold rolled steel panels (CRS) and 4 × 12 inch minimum spangle commercial hot-dipped galvanized panels (GALV), temper rolled one percent, were sprayed in the sequence one minute cleaner, one-half minute fresh warm water spray rinse, one minute zinc phosphating solution, one-half minute cold water rinse, and one-half minute resin solution, after which they were dried in a circulating air oven for 5 minutes at 275° F. Control panels were prepared in the same manner except that they were oven dried following a one minute cold tap water rinse following the zinc phosphating step, or alternatively treated in commercial post-treatment solution containing about 0.04% chromic acid (CrO3) at a pH of about 4 (80° F.) for one-half minute following the cold water rinse and oven dried.

Aufarbeitung

  1. customIn a second spray tank, a conventional alkaline cleaner was prepared at a concentration of 1 ounce per gallon
  2. temperaturewas heated to 145° F
  3. customwere sprayed in the sequence one minute
  4. washrinse, one minute zinc phosphating solution, one-half minute cold water
  5. washrinse
  6. customone-half minute resin solution, after which they were dried in a circulating air oven for 5 minutes at 275° F
  7. customControl panels were prepared in the same manner except that they
  8. customdried
  9. washcold tap water rinse
  10. additionalternatively treated in commercial post-treatment solution
  11. additioncontaining about 0.04% chromic acid (CrO3) at a pH of about 4 (80° F.) for one-half minute
  12. washrinse
  13. customoven dried

Quellen und Nachweise

ORD-Eintrag
ord-004dadbfc3d449ee9a07b2573d307449
Quelldatensatz
uspto-grants-1977_08
Patentnummer
US04039353

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